KR102229857B1 - Stent transfer Device and manufacturing method - Google Patents

Abstract

It relates to a stent moving device, specifically, a first wire, a second wire separated from the first wire, and a medical stent therein, one end fixed to the first wire, the other end of the second wire It may include at least one loop (loop) which is pulled by and shrinks the stent accommodated therein.

Description

Stent transfer device and manufacturing method {Stent transfer Device and manufacturing method}

The present invention relates to a stent moving apparatus and a manufacturing method, and specifically, a loop accommodates the stent, contracts and contracts the stent, and then moves the stent.

Coronary interventions that treat narrowed coronary arteries by physically widening them include balloon dilatation and stent surgery. The stent procedure can reduce acute contraction and stenosis of the coronary artery, which is a disadvantage of balloon dilatation. In particular, drug-releasing stents have been developed and used to continuously release antiproliferative drugs on metal stents by coating them with polymer technology.

The stent used in the stent procedure is a metallic foreign material, and the risk of thrombus formation increases when exposed to blood. Stent thrombosis is a blood clot that occurs after a stent is inserted. Blood from a patient with a stent is entangled and a small lump of blood clot is formed. The manifestation pattern can be serious.

Korean Patent Registration Publication No. 0455343 (Publication date: March 10, 2003) Korean Patent Registration Publication No. 10-2006-0062359 (Publication date: June 12, 2006) Japanese Patent Registration Publication No. JP 5547079 (Publication date: May 23, 2010)

According to an embodiment, at least one loop for receiving a medical stent therein, and at least one of both ends is pulled to constrict the stent accommodated therein, and corresponding to each of the at least one loop A receiving portion for accommodating at least a portion of the at least one loop through the opening portion-at least a portion of the at least one loop is pulled in through the opening so that the at least one loop is constricted and contracted. .

According to an embodiment, the stent is a drug-eluting type, and a threshold amount or more of a drug may be released within a preset time.

In addition, the stent moving device further includes a stent moving unit for moving the constricted stent, and the stent from which the drug having a threshold amount is released may be recovered outside the body by the stent moving unit.

According to another embodiment, the stent may be inserted into a blood vessel and used in an angioplasty procedure.

The stent moving apparatus according to an embodiment may further include a stent extension part for extending the constricted stent in a direction corresponding to a direction in which the stent is constricted.

Specifically, the stent extension portion may be a balloon.

According to another embodiment, it further comprises a stent moving part for moving the constricted stent, the constricted stent is moved to another part of the body by the stent moving part, and the stent is closed by the stent extension part. It can be extended in a direction corresponding to the opened direction.

In addition, the loop may include at least both ends of the stent to close the stent.

In the stent moving device according to another embodiment, at least a portion is provided in a helical shape, and when at least one side is pulled, the diameter of the helical shape decreases, thereby constricting and contracting the medical stent accommodated in the spiral, and And a receiving portion for receiving at least a portion of the wire through an opening corresponding to the wire, wherein at least a portion of the wire is pulled through the opening so that the spiral of the wire is constricted and contracted.

According to an embodiment, the stent may be formed by repeatedly arranging a grid formed of a plurality of wires, and the loop may pass through the grids of the stent to accommodate the stent.

1 shows the components of a stent moving device according to an embodiment.
2 shows a stent moving device accommodating a stent according to an embodiment.
3 is a diagram illustrating an operation of retracting a stent by a stent moving device according to an embodiment.
4 shows the operation of the stent extension unit of the stent moving device according to an embodiment.
5A to 5D are cross-sectional views of the inside of the receiving portion at both ends of the loop for explaining how the loop is pulled according to the embodiment.

Specific structural or functional descriptions of the embodiments are disclosed for the purpose of illustration only, and may be changed and implemented in various forms. Accordingly, the embodiments are not limited to a specific disclosure form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical idea.

Although terms such as first or second may be used to describe various components, these terms should be interpreted only for the purpose of distinguishing one component from other components. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it is to be understood that it may be directly connected or connected to the other component, but other components may exist in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, action, component, part, or combination thereof is present, but one or more other features or numbers, It is to be understood that the presence or addition of steps, actions, components, parts or combinations thereof does not preclude the possibility of preliminary exclusion.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the relevant technical field. Terms as defined in a commonly used dictionary should be construed as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present specification. Does not. Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The same reference numerals shown in each drawing indicate the same members.

1 shows the operation of the components of the stent moving device according to an embodiment.

The stent moving device 100 according to an embodiment accommodates a medical stent therein, and at least one loop 110 for retracting and contracting the stent accommodated therein by pulling at least one of both ends thereof, the at least Receiving portion 120 for receiving at least a portion of the at least one loop through the opening 121 corresponding to each of the one loop-At least one of the at least one loop by pulling in at least a portion of the at least one loop through the opening It may include-the loop of the retracted and contracted.

The material of the loop 110 may be metal, for example, and may be a material such as a stent inserted into a blood vessel. However, the material of the loop 110 is not limited to metal and may be a material having a tension capable of contracting the stent. In addition, the receiving portion 120 may be a catheter by way of example, and may be a material that safely accommodates and pulls a loop that closes the stent.

The loop 110 may be accommodated by wrapping the stent, and the maximum area of the loop must be larger than the area of the blood vessel to be treated since the stent supporting the blood vessel wall must be accommodated. Both ends of the loop 110 may be gathered through the holes 121 of the receiving portions 120 at both ends of the loop, and both ends of the loop may be pulled by a surgeon from the outside of the stent moving device so that the stent may be closed. An operation method in which both ends of the loop are pulled will be described later with reference to FIGS. 5A to 5D.

According to an embodiment, the stent may be formed by repeatedly arranging a grid formed of a plurality of wires, and the loop may pass through the grids of the stent to accommodate the stent. When the loop passes between the stents to receive the stent, the stent moving device may relatively stably accommodate the stent.

2 shows a stent moving device in which a stent is accommodated according to an embodiment.

The stent moving device 100 according to an embodiment accommodates the medical stent 200 therein, and at least one loop 110 for retracting and contracting the stent accommodated therein by pulling both ends thereof, and the Receptacle 120 for receiving at least a portion of the at least one loop through an opening corresponding to each of the at least one loop-the at least one loop by pulling at least a portion of the at least one loop through the opening May include-is contracted and contracted.

Although the loop 110 is expressed in a circular shape according to FIG. 2, the shape is illustrative and may have various shapes, and the area of the loop may be an area capable of accommodating the stent 200.

According to an embodiment, the loop 110 may include at least both ends of the stent 200 to close the stent. When a plurality of points including both ends of the stent 200 are closed and contracted, the stent can be safely moved or recovered.

The stent according to an embodiment is a drug-eluting type, and a threshold amount or more of a drug may be released within a preset time. The configuration of the drug-releasing stent may include a conventional bare or coated metal stent as a platform, and a polymer that controls the release of the drug by coating a drug, and a drug mixed with the polymer.

The drug-releasing stent may use a method of loading a drug into the pores of a porous metal stent, or mixing a drug with a polymer that coats the stent. The release rate can be controlled. In addition, the drug release rate may be controlled by the number or size of pores on the porous metal surface.

According to the above embodiment, the time at which the drug is released may be 5 to 10 minutes by way of example, and the time may be arbitrarily designated by a practitioner as a time at which the stent can be recovered after the stent procedure. Alternatively, when a lesion occurs in a plurality of sites in a connected blood vessel, the time for which the drug is released may be a limit time for releasing the drug by moving to a site to be treated among the plurality of sites. According to another embodiment, the drug-releasing stent may be moved or recovered to another site after releasing the drug by a critical amount.

The stent according to an embodiment may be inserted into a blood vessel and used in an angioplasty procedure. General stents can be inserted into internal organs other than blood vessels such as bile ducts and ureters, but major blood vessels around the heart are sensitive and may require a high degree of stability in that they are organs directly related to life. Therefore, a method of hanging the hook on the stent or the like may damage the blood vessel wall, but a method of accommodating the stent with a loop and collecting the stent may eliminate a risk factor for damaging the blood vessel.

3 is a diagram illustrating an operation of retracting a stent by a stent moving device according to an embodiment.

In the stent moving apparatus according to an embodiment, both ends of the loop 110 are gathered in one place, and at least one of both ends of the loop itself or at least one of the wires connected to both ends may be pulled to contract the stent 200 (300). ). When the loop 200 is pulled, the area of the loop viewed from the front is narrowed, so that the stent 200 can be closed and contracted.

According to an embodiment, although not shown in the drawing, a stent moving part for moving the constricted drug-releasing stent may be further included, and the stent from which the drug has been released above a threshold amount may be recovered to the outside of the body by the stent moving part.

4 shows the operation of the stent extension unit of the stent moving device according to an embodiment.

According to an embodiment, a stent extension part 400 for extending the constricted stent 200 in a direction corresponding to a direction in which the stent is closed may be further included, and the stent extension part may be a balloon. The balloon of the shape shown in FIG. 4 is an example, and may be an inflated device used to close the stent to the blood vessel wall.

According to another embodiment, although not shown in the drawing, further comprising a stent moving part for moving the constricted stent, the constricted stent is moved to another part of the body by the stent moving part, and the stent extension part Accordingly, the stent may be extended in a direction corresponding to the closed direction.

When there are a plurality of lesioned sites in the connected blood vessel, the stent moving device may close the stent through a loop, the stent moving part moves the constricted stent, and the stent extension part moves the stent to the site where other lesions have occurred. Can be elongated.

5A to 5D are cross-sectional views of the inside of the receiving portions at both ends of the loop for explaining a method of pulling the loop according to the embodiment.

5A is a method 500 of operating a stent moving device in which one end of at least one loop is connected to each other and can be pulled according to an embodiment. Since one end of the loop is connected to each other, only one end of the loop located at the end comes out to the ends of the receiving portions at both ends of the loop. Therefore, the operator can contract the stent by pulling only one wire.

5B is a method 510 of operating a stent moving device in which both ends of a loop are connected and pulled by distinct wires 511 and 512 according to another embodiment. Since one end and the other end of the at least one loop are connected to two different wires 511 and 512, the operator can retract and contract the stent by pulling only the two wires 511 and 512. The wires 511 and 512 may be exemplarily made of metal or plastic, but may be connected with the same material as the loop.

5C is a method 520 of operating a stent moving device in which both ends of at least one loop can be pulled according to another embodiment. Both ends of the loop are not connected to one end of a wire or other loop and can be pulled directly by the operator. Thus, at least one and all of the loops can be pulled with equal force.

5D is an operation method 530 of a stent moving device in which both ends of a loop are pulled to close and contract a stent according to an embodiment. At least a part of one wire 110 is provided in a helical shape, and when at least one side of the wire is pulled, the diameter of the helical shape is reduced, so that the medical stent accommodated in the spiral can be closed and contracted.

In addition, the embodiment may include a receiving portion 120 for receiving at least a portion of the wire through the openings 531 and 532 corresponding to the wire, the receiving portion through the openings 531 and 532 When at least a portion of the wire is pulled in, the spiral of the wire may be closed and contracted.

According to an embodiment, a support part 533 is installed inside the receiving part so that one end of the wire accommodated in a second direction distinct from the first direction in which the wire is pulled through the receiving part is the first end of the wire inside the receiving part. One end of the wire can be caught so that it is pulled in one direction. For example, according to FIG. 5D, one end of the wire accommodated in a second direction distinct from the first direction pulled through the receiving portion may be received through at least one of the openings 531, and the wire received in the second direction. It may be caught on the support 533 in order to change the direction of one end of it to the first direction to be pulled. Hooking on the support 533 and being pulled in the first direction can use the principle of a pulley that changes the direction of the force.

The embodiments described above may be implemented as a hardware component, a software component, and/or a combination of a hardware component and a software component. For example, the devices, methods, and components described in the embodiments are, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate (FPGA). array), programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications executed on the operating system. Further, the processing device may access, store, manipulate, process, and generate data in response to the execution of software. For the convenience of understanding, although it is sometimes described that one processing device is used, one of ordinary skill in the art, the processing device is a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of these, configuring the processing unit to operate as desired or processed independently or collectively. You can command the device. Software and/or data may be interpreted by a processing device or, to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodyed in a transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

As described above, although the embodiments have been described by the limited drawings, a person of ordinary skill in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order from the described method, and/or components such as systems, structures, devices, circuits, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Claims (21)

At least one loop for accommodating a medical stent therein, and at least one end of both ends is pulled to constrict and constrict the stent accommodated therein;
A wire connected to the pulled end;
A receiving portion accommodating at least a portion of the at least one loop through an opening corresponding to each of the at least one loop; -At least a portion of the at least one loop is pulled in through the opening so that the at least one loop is closed and contracted-And
A support portion in which one end of the wire is hooked so that one end of the wire accommodated in a second direction distinct from the first direction in which the wire is pulled through the receiving portion is pulled in the first direction from the inside of the receiving portion
A stent moving device comprising a. The method of claim 1,
The stent is a drug-eluting type, and a stent moving device that allows the drug to be released over a threshold amount within a preset time. The method of claim 2,
Further comprising a stent moving part for moving the constricted stent,
A stent moving device in which the stent from which the drug is released in the critical amount or more is recovered to the outside of the body by the stent moving unit. The method of claim 1,
The stent is inserted into a blood vessel to move the stent used for angioplasty procedure. The method of claim 1,
A stent extension part that extends the constricted stent in a direction corresponding to the direction in which the stent is constricted
The stent moving device further comprising a. The method of claim 5,
The stent extension unit is a balloon (Balloon) stent movement device. The method of claim 5,
Further comprising a stent moving part for moving the constricted stent,
The constricted stent
It is moved to other parts of the body by the stent moving part,
A stent moving device extending in a direction corresponding to a direction in which the stent is closed by the stent extension part. The method of claim 1,
The loop is a stent moving device for closing the stent including at least both ends of the stent. The method of claim 1,
The stent is formed by repeatedly arranging a plurality of grids formed of a plurality of wires,
The loop is a stent moving device for receiving the stent by passing through a plurality of gratings of the stent. At least a portion is provided in a spiral shape, when at least one side is pulled by reducing the diameter of the spiral shape, a wire for constricting and constricting the medical stent accommodated in the spiral;
A receiving portion receiving at least a portion of the wire through an opening corresponding to the wire; -At least a part of the wire is pulled through the opening so that the spiral of the wire is constricted and contracted-And
A support portion in which one end of the wire is caught so that one end of the wire, accommodated in a second direction distinct from the first direction in which the wire is pulled through the receiving portion, is pulled in the first direction from the inside of the receiving portion
A stent moving device comprising a. delete Receiving a medical stent therein, and forming at least one loop for contracting and contracting the stent accommodated therein by pulling at least one of both ends;
Forming a wire connected to the pulled end;
A receiving portion for receiving at least a portion of the at least one loop through an opening corresponding to each of the at least one loop-Since at least a portion of the at least one loop is pulled in through the opening, the at least one loop is opened. Forming a shrinking- And
The step of forming a support portion to which one end of the wire is caught so that one end of the wire accommodated in a second direction distinct from the first direction in which the wire is pulled through the receiving portion is pulled from the inside of the receiving portion in the first direction.
Method of manufacturing a stent moving device comprising a. The method of claim 12,
The stent is a drug-eluting type, and a method of manufacturing a stent moving device in which a drug of a critical amount or more is released within a preset time. The method of claim 13,
The method of manufacturing a stent moving device further comprising the step of creating a stent moving part that moves the constricted stent so that the stent from which the drug has been released with the threshold amount or more is recovered to the outside of the body. The method of claim 12,
The stent is inserted into a blood vessel to manufacture a stent moving device used for angioplasty procedure. The method of claim 12,
Generating a stent extension part for extending the constricted stent in a direction corresponding to the direction in which the stent is constricted
A method of manufacturing a stent moving device further comprising a. The method of claim 16,
Further comprising the step of creating a stent moving unit for moving the constricted stent,
The constricted stent
It is moved to other parts of the body by the stent moving part,
A method of manufacturing a stent moving device extending in a direction corresponding to a direction in which the stent is closed by the stent extension part. The method of claim 12,
The loop includes at least both ends of the stent, a method of manufacturing a stent moving device for closing the stent. The method of claim 12,
The stent is formed by repeatedly arranging a plurality of grids formed of a plurality of wires,
The loop is a method of manufacturing a stent moving device for receiving the stent by passing through a plurality of gratings of the stent. A method of forming a wire that is provided in a spiral shape at least in part, and when at least one side is pulled, the diameter of the spiral shape is reduced, thereby constricting and contracting the medical stent accommodated in the spiral;
A method of forming a receiving portion for receiving at least a portion of the wire through an opening corresponding to the wire, wherein at least a portion of the wire is pulled through the opening so that the spiral of the wire is constricted and contracted; And
A method of forming a support portion in which one end of the wire is caught so that one end of the wire accommodated in a second direction distinct from the first direction in which the wire is pulled through the receiving portion is pulled from the inside of the receiving portion in the first direction
Method of manufacturing a stent moving device comprising a. delete

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